Why does MATLAB give an error on an axes plot when I change with new variable (a22) in my formula??

Error using set Bad property value found. Object Name : axes Property Name : 'YLim' Values must be increasing and non-NaN.

Error in axis>LocSetLimits (line 208) set(ax,...

Error in axis (line 94) LocSetLimits(ax(j),cur_arg);

end
Error in fourbar (line 395)
axis([qstart qstop min(a22) max(a22)]);

Answer 1

[Sven]

Hi Sven (nice name, btw)

Replace the one line:

axis([qstart qstop min(a22) max(a22)]);

With the two lines:

disp([qstart qstop min(a22) max(a22)])
axis([qstart qstop min(a22) max(a22)]);

And then re-run your code. I bet that the last thing before it errors will tell you is that your max(a22) is equal to min(a22).

After that you can probably replace it with:

padding = 0.5; % Just some number that gives you a reasonable axis size
axis([qstart qstop [min(a22) max(a22)] + [-1 1]*padding]);

Thanks, Sven.

[sven_sight]

Hi Sven(looks like we have same name)

I've tried your suggestion and it happened exactly as you said. On the other hand, I have an array of data alpha2 inserted into the loop.

a22=alpha2*pi/180; disp(' Loading ... '); fprintf('fourbar.dat');

assem=para(29); j=0; if assem==1 i=i+1; a22(i)=para(14); % alpha 2

Do you have any other solution array is why the data is not readable?

Thanks Sven,